Collapsible form



Aug. 31, 1943 H. c. Bos'rwlcK COLLAPS IBLE FORM original Filed Ju1y 1s,193e l #6.6M M KMP i Reissued Aug. 3,1, 1943 UNITED 2, ST'lE- Henry C.Bostwck, Akron, Ohio,

Akron Standard Mold Company a corporation of Ohio dated March' 16, 1937,se-

original' No. 2,013,729, rial No. 90,958, July assignor to The' Akron;4Ohio,

.1936. Application for reissue'March 15, 1939, Serial No. 261,977

Claims. (Cl. 154-9) This invention relates tocollapsible, segmentalwinding forms or drums for building bands such as those for formingtires bythe so-called pulleyband method. f

expand the drum, and it may also be automatically expanded bycentrifugal force whenrotated in either direction. It will the inventionmay. also be applied to other types of drums.- L

This lllustrateddrum has the usual lwidthwise The object 'of myinvention is to facilitate 5 removal of the tire band, especially whenthe adjustment being formed with body segmentsl!! drlimis high-crownedor made with deep, underhinged to the spider and connected with .the cutflanges against whichthe tire beads are toggle links, wing segments 2Badjstably iixed positioned as in the formed tire. If these deep thereonby screws 2l whose stems occupy slots 22 anges are rigidly formed on thedrum segments, l0 in the body segments, and thin gap-,shield segtheyoverlying segments, when the `drurn is colments 23 affixed to a centralflat rib structure on lapsed, will pile up on the underlying'ones so asthebody segments. considerably ,to yreduce the extent ,ofV collapse. Inthe preferred embodiment of my invention The present invention avoidsthis difficulty by an here illustrated, there is removablymounted inimproved arrangement of detachable bead-seateach end of the drumbody,which includes the base ing flanges.` and wing segments, asegmental collapsible bead- "Of theaccompanying drawing, Fig. 1 is arear seating flangeor ring 24y having a short cylindrielevation, insection through the shaft, of a tire. cal portion 25 flush with thecylindrical outer building drum provided with detachable bead surface ofthe adjacent wing segment 20, a flanges inaccordance with my invention..20 rounded shoulder portion 26, an undercut bead- Fig. 2 is alongitudinal section, approximately seating portion 21, and an innermarginal radial on the line 2-2 of Fig. i. portion 28. -Said bead ringalso has an axially Fig. 3 is a. fragmental elevation showing theextending mounting flange 29 fitted and locked collapsed relation ofadjoining flange segments against outward vradial movement within theand separationof their pivotal connection. marginal portion of the wingsegment, and inter- Fig. 4 is a fragmental edge View of adjoining lockedtherewith against axial movement by a flangeY segments showing amodified pivotal concircumferential rib on the ring flangeoccupynection. f ing a complemental groove 3| on the wing seg- 'I'hedrawing illustrates this yinvention as apr 5 ment. A slanting inwardmovement of the bead` plied to a drum ,of Vthe general-,type disclosedin 30 ring segments, to clear each o f them from the tire my Patent No.2,042,498 of June 2, 1936. III is a beads when the ring is to beremoved, is provided horizontal rotary power shaft to which is fixed afor by forming intertting maleand female cones central segment supportor spider II consisting of 32 and 33, parallel with the bead seat 21 onthe a hub and a pair of opposite arms. To the ends el ring andwingsegment respectively, andfforming of these arms, on hinge pins I2,arepivoted two 35 the end of thebase segment I9 with a correspondpairs ofchuck body segments comprising dupliing undercut bevel 34. v catemembers yI3 with underlapping ends and Each of the bead rings 24istransversely divided duplicate members I4 withfoverlappin'g ends into"segments, preferablyV unequal in number meeting those of the segments I3in expanded .y j, and/or angular length tothe drumbody segmentscondition, SaidA Segments, being arranged in so as to break jointstherewith,v said ring. segcouples, with oppositely swinging members. `Toments in this case being three invnumber includoperate the segments,there is provided the usual ing a key segment 35, an intermediatesegment 36 toggle control including asleeve'or collar I5 conand a lastsegment 31. Radial joints 3B andv 39 centric with the shaft androtatable'with or rela- ,I are formed v between the respective pairsy35, 36 tive thereto at the end of a hollow shaft I6, a pair and 36, 31,anda semitangent joint 43, with a of short linksl I'I connected withthe-underlapping curved ndenapping Surface on. the key segment SegmentsI3 and formingLWith arms 0n. Said C01' rand acomplemen'tal overlappingsurface onr the 1m" a pair 0f togles vWhich are not fullytraght'last'segment, both concentric with the pivot o f ened 1n the expanded-Aposition and a ,pa'rrof '50 said key segment, is formed between thesetwo. longer bent .n-ks" 'a formmganotief um. At the joint 4a, there isprovidedany suitable toggles with Sld'ciouar" tg? knklepmsfglhwh form'of'spring lock or latch, such as a slidable gais -overce er n reacvmg eman e con', boit 4| carried by the key segment 35 and yieldition. Whenthe collar I5 and hollow shaft I6 n tito ket ,43 in are retarded' whilethedrum is forwardly rotat- .mgly pressed .bygsprmg a' -soc k ing,as`byV means of a brake (not shown), the =55 the. last Segments-l onSWR-ging the-.ey segtoggles willfold rand collapse the drum kby its mentOutwardlllm? lts Operatlve posmon this power of rotation.V It isalso'common to collapse latch WYRUQ eltcaly lOk wgethel the ends of suchdrums by a hand-wheel. Reverse rotation 1 the sesments. and 31 againstthe pressured of thedrum while the, control collar is held will thestitchingtools as they round the shoulders of o0 may e the drum and torelease the latch, it.

be understood that manually withdrawn by its inner and.`

lmove the sides of the slot to drumabody l Y n .Shown infFlgs; `1 and"v2, the bead ringsegment's 1 lation-with the drum anyrotative'pdsitionto' simplify thek structure'y andrai/e time: in vits 'jsndoctinsto hold alignment'. n completed; the rings y'lf-laire! removed,one-seg ment at a` time, beginning withr the key segment' l remoatlonctthe: contrer pullingk on the Ahead The rwectir pairs of segments. 35,311'and 36, 31 are pivotally connectedl in end-to-end .relation at rtheir,inner periphery'by means of,- an .ear 44 on the.v posterior/one of saidsegments.

(such as 36 furthe pair 35,35),,anvaxiallyeire tosaid eartending pivotistud 4,5 screwedy y and formed witha'. headlvtiattifs inner. end,I

and an adjacent ear 41 lyinginwardly oftheV ear 44 and movable bothfpivotallysof saidst'ud 45 to` swing the anterior segineritinwI an.Smgu` i y embodiment may be mafie'.

llt will be understood that other changes of For example, while itispreferred' to makethebead" flanges as fulldepth rings detachable fromthe drum body at the latters outer periphery, to permit the greatestextent of collapsek of said body, the invention is "not whollyrestricted to such an arrangement. 1..: 71' I Clarin:`

" ly` collapsiblek segmental,

lar .relation with the posterior one', :and axially of the stud, toallow ajbead clearing" movement' 1 of the ring segment inwardly Vof thedrum" iii an axial direction, the rcombined movement ybeing a' slantingone` permitted" bytliebeveled sur,-

faces 3,2, 331and-34. Ear 41 is` alsoiormedwith af'slot or" opentsidedbearing recess 48- which, when the segments arecircumferentallyaligned',

l isisemltangentiy slanted outwardly ina direction towardy theAadjoining",` segment so as normally to `lock the pivot" joint vagainstinward radial" separation of the anterior segment shown' in Fig. 3 whenthe anterior segment, such as 35i is swung, through a' sumclent angle toor beyond! 'a posiradial joint 38;

invention, whenthe has been` einiaridiscfy into a circleas tion) or`paralleiism` with( the lnthe operation of this andfs-deeessivelyassembled in said' body and f interloclred with theiwingsegments-2Ubymeans ,1. di" tleyrbf 3l' andy groove Ml,

assembly. I The` presence of 4these bead rings lends-radial support.togtliebody segmentsH I3. 1 and 'Ils'iippleiil'enting the `action of thetoggles'r in. avoiding; any' unimended*v collapse or' the drinn, theends of the drum-'body When/thetire band is snntm the course y v y 'ortheirfremovai, after dissenting they segment Y p v from the drum body,-it be: turnedcendwfscyiiitoffan interior space 'ot tire-drinnlmorerjitslremovsi through` the een# trai aperture ori me bead on`matrice; on

' removal or bead rings..

y tnefafrumbody may their be collapsed in: the` usual-l manner.. eitherby nomiv or' by theI powerA or its; rotation; through collar t5.r y

Pig; 4 represents unmodified pivotal" connecfrom theposterior` one', butadapted' to permit suclrseparation as composed of f wardly of the form.

` finwardfradial 50,y

the individual tion betweenad-joining beadv ringse'gme'nts such` l as ananteriori keysegment 3Q" andro posterior intermediate segment,accordingy to which,` the m41. on lthe respective s'egl helicaldirection inwardlyf of i111clearingsaid,` segment from individualiremoval of the segments.

a.1.col1apsing: swinging previously described, to: allowv `f 3 "75 inwhichthev axes oli the pivot joints..- are. dir@ l ting surfaces* oible, segmental form body, and an independentbead-seating Bangestructure removably mounted vthereon and composed of segmentsvdetachable by moving them radially inward from the form body.

v2.13.52 tire-building form comprising a collapsib1e,`segmental formbody, and a collapsible beadseatingring aj series of segments Whose`adjoiningmemloersv are pivotally connected with each other,vinterlockingk with the form` body" by an outward radial movement. i l i`3. A tire-building drum comprising. a vcentral rotary segment support,Ia kcollaiiisibl'e drumybody permanently mounted"thereoirandl composedof pivoted'segments; anda *pair of. collapsible, segmental,bead#seating` rings removably locked in the ends y,of saidbodyandyfs'e'rvihg. to hold the body segments iny expanded condition. y 4. rAAvtireebuilding form comprising af collapsible, segmental `form body,`and' a" collapsible, segmental bead-seatingsring detachably ill-.izedAin the end of said body inV an underlapping relationy thereto,andinwardly `separablefrom the body.

said ring and body having complemental abutting surfaces -adapted tolpermit a"r slanting in,-

"ward separating-movement or said1 ring radially in whichv thel ring isformedA with an undercut beadfsea'ting portion, rand'` it `and* thering-abuty 'ff said"^fo'rm are beveled: to allow al slanting separatingmovement of said ring in- 6. A tire-building form comprisingcollapsible, segmental 'forniy body;l and a bead? seating ringdetachably mountedfthereonjnpdi composed Sor segments separablyconnected in series,` and detachable fromthe form; body byand movement,vsegments being separable pivot ,Ibirltrl1- permitting removal voi"v thesegments whilerthe body` "segments: remain expandedlln the tire band;n'7; A: tire-building` form, comprising a` collapsible, segmental form`body, .and an undercut," bead-seating rlngldetachably mountedthereo'x'iv andi composed ofiA segments pivotally conr'iectedy 'inseriesl andhhavingi pivotal and. axial callapsi'rig movements' inwardlyof. kthe form. to clear them of;thexftlre-beads.: P 4f l 8.1: A;:tire-bmiding- `form according to 'claim' '7` in` which the pivot joint'betweenifafpair ofring segnriier-its: includes u an? axially' extendingpivot pixi oni one segment'aiicillirir ear-on. the other coiinected bysegment;1 rotatable on said* pin and slidablethereya-'10mg to separatethe se'grrlen'tsi` 9; Aitire-buildingi'orm according" tofcl'alm' '1posed.; angularlyiot the I'formv f axis to make the caldirection;

.ring segrrien`to-A collapsiblel substantially" in av helil 1o. -A drumtypering bondingy door ,e 'comprising y a central segmental "collapsibleband, and in,-`

dependentlycollapsible side rings` engaging the interior of'ssic'central banjo. l ff y f I Ingmar c. Bosrwrcx.

`1.A.{Util-e-rliiillwiiiigform comprising a collapsremovably mountedthereon, `and y

